@import url("https://fonts.googleapis.com/css2?family=Lustria&display=swap");

:root {
  --void: #07090d;
  --carbon: #11161c;
  --graphite: #232c34;
  --cold: #e5edf2;
  --muted: #93a1ab;
  --blue: #8ecbe4;
  --amber: #c4a36a;
  --red: #b95e5a;
  --display: "Helvetica Neue", "Arial Narrow", Arial, sans-serif;
  --editorial: "Iowan Old Style", Baskerville, Georgia, serif;
  --tagline: "Lustria", "Goudy Old Style", "Iowan Old Style", Baskerville, Georgia, serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --gutter: clamp(1.25rem, 4vw, 5rem);
  --max: 1320px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--void); }
body {
  margin: 0;
  color: var(--cold);
  background: var(--void);
  font-family: var(--display);
  line-height: 1.5;
  overflow-x: hidden;
}
body.nav-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { color: inherit; }
img { max-width: 100%; display: block; }
::selection { color: var(--void); background: var(--blue); }

.skip-link {
  position: fixed;
  top: -5rem;
  left: 1rem;
  z-index: 1000;
  padding: .7rem 1rem;
  background: var(--cold);
  color: var(--void);
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 90;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 0 var(--gutter);
  border-bottom: 1px solid transparent;
  transition: background .35s ease, border-color .35s ease;
}
.site-header.scrolled {
  background: rgba(7, 9, 13, .88);
  border-color: rgba(229, 237, 242, .1);
  backdrop-filter: blur(20px);
}
.wordmark {
  font-weight: 500;
  font-size: .92rem;
  letter-spacing: .48em;
  white-space: nowrap;
}
.nav-links { display: flex; align-items: center; gap: clamp(1rem, 2vw, 2.2rem); }
.nav-links a {
  color: #bdc8cf;
  font-size: .69rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  transition: color .2s ease;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: white; }
.nav-links .nav-cta { color: var(--void); background: var(--cold); padding: .72rem 1rem; }
.menu-toggle { display: none; background: none; border: 0; padding: .5rem; }
.menu-toggle span { display: block; width: 24px; height: 1px; margin: 6px; background: var(--cold); }

.intro {
  position: fixed;
  z-index: 200;
  inset: 0;
  display: grid;
  place-items: center;
  background: #030405;
  transition: opacity 1s var(--ease), visibility 1s;
}
.intro[hidden] { display: none; }
.intro.complete { opacity: 0; visibility: hidden; }
.intro-content { width: min(90vw, 660px); }
.intro-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
  color: #67747d;
  border-bottom: 1px solid #172027;
  font-family: var(--mono);
  font-size: clamp(.62rem, 1vw, .76rem);
  letter-spacing: .12em;
  opacity: 0;
  transform: translateY(8px);
  animation: introLine .55s forwards;
}
.intro-line:nth-child(2) { animation-delay: .72s; }
.intro-line:nth-child(3) { animation-delay: 1.44s; }
.intro-line::after { content: "CONFIRMED"; color: var(--blue); }
.intro-skip {
  float: right;
  margin-top: 1.3rem;
  padding: .4rem 0;
  border: 0;
  background: none;
  color: #68757d;
  cursor: pointer;
  font-size: .64rem;
  letter-spacing: .15em;
  text-transform: uppercase;
}
@keyframes introLine { to { opacity: 1; transform: none; } }

.hero {
  min-height: 100svh;
  position: relative;
  display: flex;
  align-items: flex-end;
  isolation: isolate;
  overflow: hidden;
  background: #05070a;
}
.hero::before {
  content: "";
  position: absolute;
  z-index: -2;
  inset: 0;
  background-image: url("../images/latency-hero-desktop.webp");
  background-position: center;
  background-size: cover;
  filter: brightness(.82) saturate(.82);
  transform: scale(1.025);
  animation: heroBreathe 12s ease-in-out infinite alternate;
}
.hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(4, 6, 9, .92) 0%, rgba(4, 6, 9, .42) 42%, rgba(4, 6, 9, .08) 68%),
    linear-gradient(0deg, var(--void) 0%, transparent 38%);
}
@keyframes heroBreathe { to { transform: scale(1.055); filter: brightness(.9) saturate(.9); } }
.hero-content {
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: 9rem var(--gutter) clamp(4.5rem, 11vh, 9rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, .5fr);
  gap: clamp(2.5rem, 7vw, 7rem);
  align-items: end;
}
.eyebrow, .kicker, .system-label {
  margin: 0 0 1.2rem;
  color: var(--blue);
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .18em;
  text-transform: uppercase;
}
.hero-title {
  margin: 0;
  max-width: 900px;
  font-size: clamp(4rem, 10vw, 9rem);
  line-height: .78;
  font-weight: 300;
  letter-spacing: .14em;
  text-indent: -.03em;
}
.hero-tagline {
  margin: 2.3rem 0 1rem;
  max-width: 640px;
  font-family: var(--tagline);
  font-size: clamp(1.35rem, 2.5vw, 2.3rem);
  line-height: 1.2;
  font-weight: 400;
}
.hero-desc { max-width: 590px; color: #a9b5bd; font-size: .9rem; letter-spacing: .02em; }
.hero-cover {
  margin: 0;
  justify-self: end;
  width: min(30vw, 360px);
  transform: perspective(1300px) rotateY(-8deg) rotateX(1deg);
  filter: drop-shadow(-28px 34px 32px rgba(0,0,0,.58));
  transition: transform .8s var(--ease);
}
.hero-cover:hover { transform: perspective(1300px) rotateY(-3deg) translateY(-8px); }
.hero-cover img { width: 100%; box-shadow: 0 0 0 1px rgba(255,255,255,.12); }
.hero-cover figcaption { margin-top: 1rem; color: #74818a; font-family: var(--mono); font-size: .57rem; letter-spacing: .12em; text-align: right; text-transform: uppercase; }
.actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: .8rem 1.25rem;
  border: 1px solid var(--cold);
  background: var(--cold);
  color: var(--void);
  cursor: pointer;
  font-size: .68rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  transition: background .25s ease, color .25s ease, border-color .25s ease;
}
.button:hover { background: white; border-color: white; }
.button.secondary { color: var(--cold); background: transparent; border-color: #4b5962; }
.button.secondary:hover { border-color: var(--cold); }
.hero-index {
  position: absolute;
  right: var(--gutter);
  bottom: 2.4rem;
  display: flex;
  align-items: center;
  gap: .8rem;
  color: #6f7b83;
  font-family: var(--mono);
  font-size: .62rem;
  letter-spacing: .12em;
}
.hero-index::before { content: ""; width: 42px; height: 1px; background: #53616b; }

.section { position: relative; padding: clamp(5rem, 11vw, 10rem) var(--gutter); }
.section-inner { width: min(100%, var(--max)); margin: 0 auto; }
.section-number {
  color: #56636c;
  font-family: var(--mono);
  font-size: .64rem;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.section-title {
  margin: .8rem 0 1.6rem;
  max-width: 1000px;
  font-size: clamp(2.4rem, 6vw, 6rem);
  line-height: .98;
  font-weight: 300;
  letter-spacing: -.035em;
}
.section-copy {
  max-width: 700px;
  color: #aab5bc;
  font-family: var(--editorial);
  font-size: clamp(1.15rem, 1.8vw, 1.5rem);
  line-height: 1.65;
}
.divider { width: min(calc(100% - 2 * var(--gutter)), var(--max)); margin: 0 auto; border: 0; border-top: 1px solid #1c252b; }

.premise { background: #090c10; }
.premise-grid { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(260px, .45fr); gap: clamp(3rem, 8vw, 8rem); align-items: end; }
.premise-statement {
  margin: 0;
  font-family: var(--editorial);
  font-size: clamp(2rem, 4.5vw, 4.7rem);
  line-height: 1.1;
  letter-spacing: -.025em;
}
.premise-statement span { color: var(--blue); }
.stat-stack { border-top: 1px solid #34414a; }
.stat { padding: 1.25rem 0; border-bottom: 1px solid #202a31; }
.stat-value { display: block; font-size: clamp(2rem, 3vw, 3.5rem); font-weight: 300; }
.stat-label { color: #7d8a93; font-family: var(--mono); font-size: .62rem; letter-spacing: .12em; text-transform: uppercase; }

.book-section { background: linear-gradient(145deg, #0d1217, #06080b 66%); }
.book-grid { display: grid; grid-template-columns: minmax(280px, .75fr) minmax(0, 1.25fr); gap: clamp(4rem, 10vw, 10rem); align-items: center; }
.home-book-copy { max-width: 1040px; }
.home-book-copy .section-title { max-width: 940px; }
.home-book-copy .section-copy { max-width: 720px; }
.book-stage { min-height: 660px; display: grid; place-items: center; perspective: 1500px; }
.book-cover {
  position: relative;
  width: min(72vw, 365px);
  aspect-ratio: 2 / 3;
  overflow: hidden;
  background: var(--carbon) url("../images/latency-cover-approved.webp") center/cover;
  box-shadow: -35px 40px 80px rgba(0,0,0,.65), 0 0 0 1px rgba(255,255,255,.12);
  transform: rotateY(-13deg) rotateX(3deg);
  transition: transform .8s var(--ease);
}
.book-cover:hover { transform: rotateY(-5deg) rotateX(1deg) translateY(-8px); }
.book-cover::before { content: none; }
.book-cover::after { content: ""; position: absolute; top: 0; bottom: 0; left: 0; width: 12px; background: rgba(0,0,0,.42); box-shadow: 4px 0 14px rgba(0,0,0,.55); }
.cover-title { position: absolute; z-index: 1; top: 11%; left: 9%; right: 6%; font-size: clamp(2.2rem, 5vw, 4rem); font-weight: 300; letter-spacing: .18em; }
.cover-tagline { position: absolute; z-index: 1; left: 10%; right: 10%; bottom: 15%; font-family: var(--editorial); font-size: 1rem; }
.cover-author { position: absolute; z-index: 1; left: 10%; bottom: 6%; color: #c0cbd1; font-size: .66rem; letter-spacing: .18em; text-transform: uppercase; }
.book-copy .section-title { max-width: 720px; }
.book-copy .metadata, .home-book-copy .metadata { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1px; margin: 2.4rem 0; background: #273139; border: 1px solid #273139; }
.meta-item { padding: 1rem; background: #0d1217; }
.meta-item small { display: block; color: #71808a; font-family: var(--mono); font-size: .59rem; letter-spacing: .12em; text-transform: uppercase; }
.meta-item strong { display: block; margin-top: .3rem; font-size: .87rem; font-weight: 400; }

.world { background: #080b0e; }
.world-head { display: flex; justify-content: space-between; gap: 2rem; align-items: end; margin-bottom: 3rem; }
.world-head .section-title { margin-bottom: 0; }
.text-link { color: var(--blue); font-family: var(--mono); font-size: .65rem; letter-spacing: .14em; text-transform: uppercase; }
.text-link::after { content: "  ↗"; }
.world-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1rem; }
.world-card { position: relative; min-height: 470px; overflow: hidden; border: 1px solid #263139; background: var(--carbon); }
.world-card:nth-child(1), .world-card:nth-child(4) { grid-column: span 7; }
.world-card:nth-child(2), .world-card:nth-child(3) { grid-column: span 5; }
.world-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; filter: saturate(.66) brightness(.7); transition: transform .8s var(--ease), filter .5s ease; }
.world-card:hover img { transform: scale(1.035); filter: saturate(.82) brightness(.84); }
.world-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, #07090d 0%, rgba(7,9,13,.08) 72%); }
.world-card-copy { position: absolute; z-index: 1; inset: auto 1.8rem 1.8rem; }
.world-card .number { color: var(--blue); font-family: var(--mono); font-size: .6rem; letter-spacing: .12em; }
.world-card h3 { margin: .4rem 0 .35rem; font-size: 1.7rem; font-weight: 400; }
.world-card p { margin: 0; max-width: 460px; color: #8f9ba3; font-family: var(--editorial); }
.world-card.interval-card { background: radial-gradient(circle at 50% 50%, #17242d 0, #090d11 42%, #050709 72%); }
.world-card.interval-card::before { content: "11.000"; position: absolute; inset: 14% auto auto 50%; transform: translateX(-50%); color: rgba(229,237,242,.09); font-size: clamp(5rem, 10vw, 10rem); font-weight: 200; letter-spacing: -.06em; }

.test-section { background: var(--cold); color: var(--void); }
.test-grid { display: grid; grid-template-columns: .75fr 1.25fr; gap: clamp(3rem, 9vw, 9rem); }
.test-section .kicker { color: #41687a; }
.test-section .section-title { max-width: 560px; }
.test-note { max-width: 440px; color: #4d5a61; font-family: var(--editorial); font-size: 1.1rem; }
.test-panel { align-self: center; min-height: 430px; padding: clamp(1.5rem, 4vw, 3rem); background: #0d1217; color: var(--cold); display: flex; flex-direction: column; justify-content: space-between; }
.test-progress { display: flex; gap: 6px; }
.test-progress span { flex: 1; height: 2px; background: #28343c; }
.test-progress span.active { background: var(--blue); }
.test-question { margin: 3rem 0; font-family: var(--editorial); font-size: clamp(1.7rem, 3vw, 3rem); line-height: 1.2; }
.test-options { display: grid; grid-template-columns: 1fr 1fr; gap: .8rem; }
.test-option { padding: 1rem; border: 1px solid #40505a; background: transparent; cursor: pointer; font-family: var(--mono); font-size: .68rem; letter-spacing: .15em; text-transform: uppercase; }
.test-option:hover, .test-option:focus { border-color: var(--blue); background: rgba(142,203,228,.06); }
.test-result { display: none; }
.test-result.visible { display: block; }
.test-result h3 { margin: 0 0 1rem; font-family: var(--editorial); font-size: clamp(2.2rem, 4vw, 4rem); line-height: 1.08; }
.test-result p { color: #a7b4bb; }

.certification { background: #05070a; text-align: center; }
.certification .section-copy { margin-inline: auto; }
.hold-wrap { width: min(92vw, 540px); margin: 3.5rem auto 0; }
.hold-button {
  --progress: 0%;
  position: relative;
  width: 100%;
  min-height: 86px;
  overflow: hidden;
  border: 1px solid #34424b;
  background: transparent;
  cursor: pointer;
  color: var(--cold);
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  touch-action: none;
}
.hold-button::before { content: ""; position: absolute; inset: 0 auto 0 0; width: var(--progress); background: rgba(142,203,228,.13); }
.hold-button span { position: relative; z-index: 1; }
.hold-time { margin-top: 1rem; color: #6e7a83; font-family: var(--mono); font-size: .68rem; letter-spacing: .15em; }
.cert-result { min-height: 2rem; margin-top: 1.5rem; color: var(--blue); font-family: var(--mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; }
.sound-control { display: flex; align-items: center; justify-content: center; gap: 1rem; margin: 2rem auto 0; }
.sound-toggle { display: inline-flex; align-items: center; gap: .65rem; padding: .7rem .9rem; border: 1px solid #34424b; background: transparent; color: #9ba8b0; cursor: pointer; font-family: var(--mono); font-size: .61rem; letter-spacing: .12em; text-transform: uppercase; }
.sound-toggle:hover, .sound-toggle[aria-pressed="true"] { color: var(--cold); border-color: var(--blue); }
.sound-dot { width: 7px; height: 7px; border-radius: 50%; background: #52616a; box-shadow: 0 0 0 0 rgba(142,203,228,0); }
.sound-toggle[aria-pressed="true"] .sound-dot { background: var(--blue); box-shadow: 0 0 14px rgba(142,203,228,.7); }
.sound-note { margin: .9rem auto 0; color: #67747c; font-size: .65rem; }

.newsletter { background: var(--carbon); }
.newsletter-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(3rem, 8vw, 8rem); align-items: end; }
.newsletter .section-title { margin-bottom: 0; }
.signup-form { display: grid; grid-template-columns: 1fr auto; gap: .7rem; }
.signup-form label { grid-column: 1 / -1; color: #84929a; font-size: .73rem; }
.signup-form input { min-height: 52px; width: 100%; border: 1px solid #3b4851; border-radius: 0; background: #090d11; color: var(--cold); padding: 0 1rem; }
.form-message { grid-column: 1/-1; min-height: 1.2rem; margin: .3rem 0 0; color: var(--blue); font-size: .7rem; }
.privacy-note { grid-column: 1/-1; margin: 0; color: #6d7981; font-size: .65rem; }

.press-strip { background: #07090d; }
.press-grid { display: flex; align-items: center; justify-content: space-between; gap: 3rem; }
.press-grid h2 { margin: 0 0 .7rem; font-size: clamp(1.7rem, 3vw, 3rem); font-weight: 300; }
.press-grid p { margin: 0; color: #829099; font-family: var(--editorial); }

.site-footer { padding: 3.5rem var(--gutter); border-top: 1px solid #1c252b; background: #050609; }
.footer-inner { width: min(100%, var(--max)); margin: 0 auto; display: grid; grid-template-columns: 1fr auto; gap: 2rem; align-items: end; }
.footer-wordmark { margin: 0 0 .6rem; font-size: 1.15rem; letter-spacing: .45em; }
.site-footer small { color: #647078; font-size: .64rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1.5rem; color: #87949c; font-size: .68rem; text-transform: uppercase; letter-spacing: .12em; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }

/* Interior pages */
.page-hero { min-height: 72svh; display: flex; align-items: end; padding: 10rem var(--gutter) 5rem; position: relative; overflow: hidden; background: #0a0e12; }
.page-hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(7,9,13,.94), rgba(7,9,13,.36)), var(--page-image, none) center/cover; opacity: .78; }
.page-hero-content { position: relative; width: min(100%, var(--max)); margin: 0 auto; }
.page-hero h1 { margin: 0; max-width: 960px; font-size: clamp(3.6rem, 10vw, 9rem); font-weight: 300; line-height: .86; letter-spacing: -.04em; }
.page-hero p { max-width: 660px; margin: 1.8rem 0 0; color: #b4c0c7; font-family: var(--editorial); font-size: clamp(1.15rem, 2vw, 1.55rem); }
.editorial-layout { display: grid; grid-template-columns: minmax(180px, .38fr) minmax(0, 1fr); gap: clamp(3rem, 9vw, 9rem); }
.editorial-aside { position: sticky; top: 110px; align-self: start; color: #728089; font-family: var(--mono); font-size: .62rem; letter-spacing: .12em; text-transform: uppercase; }
.prose { max-width: 810px; }
.prose h2 { margin: 3.5rem 0 1rem; font-size: clamp(2rem, 4vw, 3.8rem); font-weight: 300; line-height: 1.05; }
.prose h2:first-child { margin-top: 0; }
.prose p { color: #b0bac1; font-family: var(--editorial); font-size: clamp(1.08rem, 1.6vw, 1.32rem); line-height: 1.75; }
.prose .lead { color: var(--cold); font-size: clamp(1.5rem, 2.5vw, 2.2rem); line-height: 1.45; }
.prose hr { margin: 4rem 0; border: 0; border-top: 1px solid #283239; }
.fact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin: 3rem 0; background: #27323a; border: 1px solid #27323a; }
.fact-card { min-height: 170px; padding: 1.5rem; background: #0b1014; }
.fact-card small { color: #6e7c85; font-family: var(--mono); font-size: .59rem; letter-spacing: .12em; text-transform: uppercase; }
.fact-card strong { display: block; margin-top: 2.5rem; font-size: 1.25rem; font-weight: 400; }
.entry-list { display: grid; gap: 1px; background: #28333b; border: 1px solid #28333b; }
.entry { display: grid; grid-template-columns: .35fr 1fr; gap: 2rem; padding: clamp(1.5rem, 4vw, 3rem); background: #0a0e12; }
.entry h2 { margin: 0; font-size: clamp(1.7rem, 3vw, 3rem); font-weight: 300; }
.entry p { margin: 0; color: #9ba7af; font-family: var(--editorial); font-size: 1.1rem; line-height: 1.65; }
.entry .entry-code { color: var(--blue); font-family: var(--mono); font-size: .6rem; letter-spacing: .12em; }
.archive-preview { min-height: 80svh; display: grid; place-items: center; text-align: center; background: linear-gradient(rgba(7,9,13,.66), #07090d), url("../images/the-archive.webp") center/cover fixed; }
.archive-preview-content { max-width: 780px; padding: 8rem var(--gutter); }
.archive-preview h1 { margin: 0; font-size: clamp(4rem, 12vw, 10rem); font-weight: 250; letter-spacing: -.05em; }
.archive-preview p { color: #aeb9bf; font-family: var(--editorial); font-size: 1.3rem; }
.archive-records { background: #080b0e; }
.record-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1rem; margin-top: 3rem; }
.record-card { grid-column: span 4; min-height: 390px; display: flex; flex-direction: column; padding: clamp(1.4rem, 3vw, 2.2rem); border: 1px solid #2c3740; background: linear-gradient(145deg, #10171c, #090c10); }
.record-card.featured { grid-column: span 8; background: linear-gradient(rgba(7,9,13,.44), rgba(7,9,13,.92)), url("../images/the-archive.webp") center/cover; }
.record-code { color: var(--blue); font-family: var(--mono); font-size: .6rem; letter-spacing: .14em; text-transform: uppercase; }
.record-card h2 { margin: auto 0 1rem; max-width: 680px; font-family: var(--tagline); font-size: clamp(1.8rem, 3vw, 3.5rem); font-weight: 400; line-height: 1.12; }
.record-card p { margin: 0; color: #96a3ab; font-family: var(--editorial); font-size: 1rem; line-height: 1.6; }
.assurance-list { display: grid; gap: .8rem; margin: auto 0 1rem; color: #b9c8d0; font-family: var(--mono); font-size: .65rem; letter-spacing: .1em; }
.assurance-list span::before { content: "✓"; margin-right: .7rem; color: var(--blue); }
.profile-sheet { display: grid; grid-template-columns: .55fr 1.45fr; gap: clamp(3rem, 8vw, 8rem); }
.profile-data { align-self: start; border-top: 1px solid #34414a; }
.profile-row { padding: 1rem 0; border-bottom: 1px solid #212b32; }
.profile-row small { display: block; color: #68757e; font-family: var(--mono); font-size: .58rem; letter-spacing: .13em; text-transform: uppercase; }
.profile-row strong { display: block; margin-top: .35rem; font-size: .9rem; font-weight: 400; }
.profile-copy h2 { margin: 0 0 1rem; font-family: var(--tagline); font-size: clamp(2.2rem, 4.5vw, 4.5rem); font-weight: 400; line-height: 1.06; }
.profile-copy h3 { margin: 3rem 0 .8rem; color: var(--blue); font-family: var(--mono); font-size: .65rem; font-weight: 400; letter-spacing: .14em; text-transform: uppercase; }
.profile-copy p { color: #b0bbc2; font-family: var(--editorial); font-size: clamp(1.05rem, 1.5vw, 1.28rem); line-height: 1.72; }
.profile-copy .lead { color: var(--cold); font-family: var(--tagline); font-size: clamp(1.45rem, 2.5vw, 2.25rem); line-height: 1.4; }

@media (max-width: 980px) {
  .nav-links { position: fixed; inset: 0; display: none; flex-direction: column; justify-content: center; background: rgba(5,7,10,.98); }
  .nav-links.open { display: flex; }
  .nav-links a { font-size: .9rem; }
  .menu-toggle { display: block; position: relative; z-index: 2; }
  .premise-grid, .book-grid, .test-grid, .newsletter-grid, .editorial-layout { grid-template-columns: 1fr; }
  .hero-content { grid-template-columns: minmax(0, 1fr) minmax(220px, .5fr); }
  .editorial-aside { position: static; }
  .world-card:nth-child(n) { grid-column: span 12; }
  .fact-grid { grid-template-columns: 1fr; }
  .press-grid { align-items: flex-start; flex-direction: column; }
  .record-card, .record-card.featured { grid-column: span 12; min-height: 340px; }
  .profile-sheet { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .site-header { height: 64px; }
  .hero::before { background-image: url("../images/latency-hero-mobile.webp"); background-position: center bottom; }
  .hero::after { background: linear-gradient(180deg, rgba(4,6,9,.62), rgba(4,6,9,.12) 45%, var(--void) 100%); }
  .hero-content { padding-top: 7.5rem; padding-bottom: 5rem; align-self: stretch; display: flex; flex-direction: column; justify-content: flex-start; }
  .hero-title { font-size: clamp(3rem, 18vw, 5.4rem); letter-spacing: .1em; }
  .hero-tagline { margin-top: 1.4rem; }
  .hero-desc { font-size: .8rem; }
  .hero-cover { order: -1; align-self: flex-end; width: min(46vw, 230px); margin: 1rem 0 1.5rem; }
  .hero-cover figcaption { display: none; }
  .hero-index { display: none; }
  .world-head { align-items: flex-start; flex-direction: column; }
  .book-stage { min-height: 540px; }
  .book-copy .metadata, .home-book-copy .metadata { grid-template-columns: 1fr; }
  .signup-form { grid-template-columns: 1fr; }
  .test-options { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .entry { grid-template-columns: 1fr; }
  .page-hero { min-height: 64svh; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .intro { display: none; }
  .reveal { opacity: 1; transform: none; }
}